CN214672385U - Double-function temp. controller - Google Patents

Abstract

The utility model discloses a difunctional temperature controller, which comprises a movable contact spring, wherein the movable contact spring is provided with a movable contact; the fixed contact piece is provided with a fixed contact point which is contacted with the movable contact point; one end of the thermal actuator is connected with the movable contact piece through an insulating transmission piece, and the thermal actuator drives the movable contact piece to act when being heated so as to enable the movable contact to leave the fixed contact; the first terminal is connected with the movable contact piece; the second terminal is provided with a connecting elastic sheet, the connecting elastic sheet is made of a conductive material, and the connecting elastic sheet is arranged below the fixed contact sheet; the secondary protection device is arranged below the connecting elastic sheet and comprises a fixed plate and an ejector rod, a groove is formed in the fixed plate, a low-melting-point solid metal layer is arranged at the bottom of the groove, the bottom of the ejector rod is arranged on the solid metal layer, and the top of the ejector rod pushes the connecting elastic sheet to enable the connecting elastic sheet to contact with the fixed contact sheet. The difunctional temperature controller of this embodiment has integrateed the function of secondary protection, reduces other electrical elements's connection, simplifies the return circuit, and the installation of being convenient for, the security is higher.

Description

Double-function temp. controller

Technical Field

The utility model relates to a control by temperature change field, concretely relates to difunctional temperature controller.

Background

The temperature controller is a device for controlling the on-off of an electric element according to the temperature, and is widely used in electric cookers, electric ovens, electric baking trays and other household appliances and other articles for daily use. The main action parts of the temperature controller are a thermal moving plate and a metal reed with elasticity, the thermal moving plate is composed of at least two metals with different thermal expansion coefficients, when the thermal moving plate is heated, the thermal moving plate is bent due to different expansion amplitudes of the metals, so that the metal reed is driven to act, a loop is cut off, and control is realized. When the temperature controller works for a long time, internal elements are aged, or the temperature controller works in severe environments such as high temperature, dust and the like, or the temperature controller suddenly encounters extremely high temperature or large current, the thermal actuator in the temperature controller can not react quickly to push the contact to bounce, and the working safety of an electric appliance controlled by the thermal actuator is threatened. The conventional solution is to connect a fuse device outside the temperature controller, to fuse under the conditions of overcurrent and overheat, to protect the loop; however, this method requires additional connection of electrical components, which increases the steps, material costs, and labor costs of product production.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a difunctional temperature controller, an organic whole is integrated with based on overflowing or the secondary protection of overtemperature in the temperature controller, ensures the security of electrical apparatus, and need not electrical components such as external fuse device.

According to the utility model discloses a difunctional temperature controller of first aspect embodiment, including the movable contact spring, the movable contact spring is provided with the movable contact; the fixed contact piece is provided with a fixed contact point which is contacted with the movable contact point; the hot moving piece is composed of at least two metals with different thermal expansion coefficients, one end of the hot moving piece is connected with the moving contact piece through an insulating transmission piece, and the hot moving piece drives the moving contact piece to act when being heated so as to enable the moving contact to leave the fixed contact; the first terminal is connected with the movable contact piece; the second terminal is provided with a connecting elastic sheet, the connecting elastic sheet is made of a conductive material, and the connecting elastic sheet is arranged below the fixed contact sheet; the secondary protection device is arranged below the connecting elastic sheet and comprises a fixing plate and an ejector rod, a groove is formed in the fixing plate, a low-melting-point solid metal layer is arranged at the bottom of the groove, the bottom of the ejector rod is arranged on the solid metal layer, and the top of the ejector rod pushes the connecting elastic sheet to enable the connecting elastic sheet to contact the fixed contact sheet.

According to the utility model discloses difunctional temperature controller of first aspect embodiment has following beneficial effect at least: the dual-function temperature controller of the embodiment utilizes the thermal actuator to realize the temperature control function, and on the basis, a secondary protection device is arranged between the fixed contact piece and the second terminal; the secondary protection device comprises a fixed plate and an ejector rod, wherein a groove is formed in the fixed plate, a low-melting-point solid metal layer is arranged at the bottom of the groove, the bottom of the ejector rod is arranged on the solid metal layer, and the top of the ejector rod pushes a connecting elastic sheet of the second terminal to contact the fixed contact sheet; after the overcurrent or overtemperature condition appears, the solid metal layer melts, the ejector rod loses the support and sinks, the connecting elastic sheet is separated from the fixed contact sheet, the loop is cut off, secondary protection is realized, even if the overcurrent or overtemperature condition disappears, the dual-function temperature controller cannot be switched on again, and the safety of an electric appliance is guaranteed. The difunctional temperature controller of this embodiment has the dual function of control by temperature change and secondary protection, need not external fuse device, reduces the connection of other electrical elements, simplifies the return circuit, and the installation of being convenient for, and reduce cost, the security is higher.

According to the utility model discloses the first aspect difunctional temperature controller, the top of difunctional temperature controller is provided with the clamp plate, be equipped with adjusting screw on the clamp plate, the adjusting screw lower extreme with the movable contact spring butt. The adjusting screw rod is screwed to adjust the position of the movable contact piece and change the distance between the movable contact piece and the fixed contact piece, so that the action temperature value of the dual-function temperature controller is set, and the function of adjustable temperature control is realized.

According to the utility model discloses the first aspect difunctional temperature controller, be provided with the restriction on the clamp plate adjusting screw rod turned range's limit structure. The limiting structure limits the rotation range of the adjusting screw rod, so that the adjusting screw rod is adjusted in the elastic range of the movable contact piece, the phenomenon that the movable contact piece is pressed too much by the adjusting screw rod is avoided, the double-function temperature controller is prevented from being out of order, and the service life of the movable contact piece is prolonged.

According to the utility model discloses the first aspect difunctional temperature controller, the last outer lug that is provided with of adjusting screw, limit structure is for setting up spacing separation blade on the clamp plate, spacing separation blade is located on the rotation route of outer lug. The rotation range of the adjusting screw rod is limited by the matching of the limiting blocking piece and the outer convex block.

According to the utility model discloses a difunctional temperature controller, the clamp plate the movable contact piece the fixed contact piece the second terminal with the heat actuated piece from top to bottom arranges in proper order and is together fixed through the connecting piece, the clamp plate the movable contact piece the fixed contact piece the second terminal with it separates to be provided with electrical insulation spare between the two arbitrary adjacent in the heat actuated piece. The electric fittings are separated by the electric insulating part, so that the influence of the error contact between the electric fittings on the normal work of the loop is avoided. Furthermore, the connecting piece is a limiting sleeve which penetrates through the pressing plate, the movable contact piece, the fixed contact piece, the second terminal, the hot contact piece and the electric insulating piece.

According to the utility model discloses the first aspect difunctional temperature controller, electrical insulation spare is ceramic insulating ring, has good insulation and heat resistance.

According to the utility model discloses the first aspect difunctional temperature controller, the fixed plate sets up the heating plate top, the fixed plate is formed by the preparation of insulating heat-resisting material.

According to the utility model discloses the first aspect difunctional temperature controller, the ejector pin is the ceramic ejector pin.

According to the utility model discloses difunctional temperature controller of first aspect, the melting point of solid-state metal level is greater than 100 ℃, less than or equal to 350 ℃.

According to the utility model discloses the first aspect difunctional temperature controller, solid-state metal level is the tin layer.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a front view of the dual-function temperature controller provided by the present invention;

FIG. 2 is a top view of FIG. 1;

fig. 3 is a left side view of fig. 1.

The reference numbers illustrate:

the adjustable thermal actuator comprises an adjusting screw 100, an outer bump 110, a ceramic thimble 120, a pressure plate 200, a limiting blocking sheet 210, a limiting sleeve 220, an electric insulating piece 300, a first terminal 400, a second terminal 500, a connecting elastic sheet 510, a movable contact sheet 600, an upper spring sheet 610, a lower spring sheet 620, a movable contact 621, a fixed contact sheet 700, a fixed contact 710, a secondary protection device 800, a fixing plate 810, a mandril 820, a solid metal layer 830, a thermal actuator 900 and an insulating transmission piece 910.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, and a plurality of means are two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The dual function thermostat according to an embodiment of the present invention is described in detail with a specific embodiment with reference to fig. 1 to 3. It is to be understood that the following description is illustrative only and is not intended as a specific limitation on the invention.

Referring to fig. 1 and 3, the present invention provides a temperature controller, which includes a pressing plate 200, a first terminal 400, a movable contact 600, a fixed contact 700, a second terminal 500, and a thermal actuator 900, which are sequentially arranged from top to bottom. Wherein the first terminal 400 is attached to the movable contact 600. Between the pressing plate 200 and the first terminal 400, between the movable contact 600 and the fixed contact 700, between the fixed contact 700 and the second terminal 500, and between the terminal 500 and the thermal actuator 900, there are provided electrical insulators 300 for separation, respectively. Specifically, the electrical insulator 300 is preferably a ceramic insulating ring having good insulating and heat-resistant properties, and is set to have different thicknesses according to the insulation requirements between adjacent electrical components, so as to achieve the optimal insulating effect with lower material cost. It is contemplated that the electrical insulator 300 may be made from other insulating materials.

Further, the pressing plate 200, the first terminal 400, the movable contact piece 600, the fixed contact piece 700, the second terminal 500, the thermal contact piece 900 and each electrical insulator 300 are respectively provided with corresponding through holes, the limiting sleeve 220 for compressing the pressing plate 200, the first terminal 400, the movable contact piece 600, the fixed contact piece 700, the second terminal 500, the thermal contact piece 900 and each electrical insulator 300 is installed through the through holes, the electrical accessories are compressed and fixed through the limiting sleeve 220, and meanwhile, the dual-function temperature controller can be conveniently installed at a required position through the through holes.

In this embodiment, the movable contact 600 includes an upper spring 610 and a lower spring 620, the upper spring 610 and the lower spring 620 are each provided as a resilient metal sheet, and one ends of the upper spring 610 and the lower spring 620 are coupled together. The upper spring 610 is connected with the first terminal 400; the bottom of the lower spring plate 620 is provided with a movable contact 621. The fixed contact piece 700 is disposed under the lower spring plate 620, and the fixed contact piece 700 is provided with the fixed contact 710 opposite to the movable contact 621. The fixed contact piece 700 is connected to the second terminal 500. The thermal plate 900 is generally disposed at the lowest portion of the dual-function thermostat, and the thermal plate 900 is composed of at least two metals having different thermal expansion coefficients, and preferably a bimetal formed by laminating two different metal plates. One end of the thermal contact piece 900 is connected to the lower spring 620 of the moving contact piece 600 through the insulating transmission member 910, and when the thermal contact piece 900 is heated and bent, the moving contact piece 600 is driven to move through the insulating transmission member 910. Specifically, insulating driving medium 910 is a ceramic member, the upper end and the lower end of insulating driving medium 910 are respectively set to be a cone portion, the thermal actuator 900 and the lower reed 620 are respectively provided with a mounting hole corresponding to the insulating driving medium 910, the cone portion of the insulating driving medium 910 is inserted into the mounting hole for fastening, the cone portion is matched with the mounting hole for fixing, the insulating driving medium is convenient to mount and replace, and smooth transmission of actions can be guaranteed. The dual-function temperature controller of this embodiment utilizes the hot plate 900 to realize the function of temperature control: when the electrical appliance with the dual-function temperature controller is in a working state, the movable contact 621 is contacted with the fixed contact 710, so that a loop is conducted; when the temperature reaches the set value, the thermal actuator 900 deforms to drive the moving contact 600 to move, so that the moving contact 621 leaves the fixed contact 710, and the loop is cut off, thereby realizing temperature control.

It is easy to think that, in order to adjust the triggering temperature value of the dual-function temperature controller, the pressure plate 200 is provided with the adjusting screw 100, the lower end of the adjusting screw 100 is provided with the ceramic thimble 120, and the ceramic thimble 120 is abutted with the upper spring 610 of the movable contact piece 600. The movable contact piece 600 can be adjusted by screwing the adjusting screw 100, so as to change the distance between the movable contact 621 and the fixed contact 710 and set the trigger temperature value of the dual-function temperature controller. The pressing plate 200 is further provided with a limiting structure for limiting the rotation range of the adjusting screw 100, the adjusting screw 100 is provided with an outer bump 110, the limiting structure is a limiting blocking piece 210 arranged on the pressing plate 200, and the limiting blocking piece 210 is located on the rotation path of the outer bump 110. The rotation range of the adjusting screw 100 is limited by the matching of the limiting baffle 210 and the outer convex block 110, so that the adjusting screw 100 can be adjusted within the elastic range of the movable contact piece 600, the phenomenon that the movable contact piece 600 is pressed too much by the adjusting screw 100 to cause the malfunction of the dual-function temperature controller is avoided, and the service life of the movable contact piece 600 is prolonged.

Further, in this embodiment, the second terminal 500 is provided with a connection elastic piece 510, the connection elastic piece 510 is made of a conductive material, and the connection elastic piece 510 is disposed below the fixed contact piece 700. A secondary protection device 800 is arranged below the connecting spring piece 510, and the secondary protection device 800 comprises a fixing plate 810 and a push rod 820. The fixing plate 810 is disposed above the thermal plate 900, and the fixing plate 810 is made of an insulating and heat-resistant material. A groove is formed in the fixing plate 810, and a low-melting-point solid metal layer 830 is disposed at the bottom of the groove. The melting point range of the solid metal layer 830 is greater than 100 ℃ and equal to or less than 350 ℃, and preferably, the solid metal layer 830 is a tin layer. The top bar 820 is preferably a ceramic top bar, the bottom of the top bar 820 is disposed on the solid metal layer 830, and the top of the top bar 820 pushes against the connecting elastic sheet 510, so that the connecting elastic sheet 510 contacts the fixed contact piece 700. The secondary protection device 800 is arranged between the fixed contact piece 700 and the second terminal 500 of the embodiment, when the over-current or over-temperature condition occurs, the solid metal layer 830 is melted, the ejector rod 820 loses support and sinks, and the connecting elastic piece 510 is separated from the fixed contact piece 700, so that a loop is cut off, secondary protection is realized, and even if the over-current or over-temperature condition disappears, the dual-function temperature controller cannot be switched on again, and the safety of an electric appliance is guaranteed. Because the secondary protection device 800 is integrated on the dual-function temperature controller of the embodiment, an external fuse device is not needed, the connection of other electrical elements can be reduced, the loop is simplified, the installation is convenient, the cost is reduced, the action is more reliable, and the safety is higher.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A dual function thermostat, comprising:

the movable contact spring is provided with a movable contact;

the fixed contact piece is provided with a fixed contact point which is contacted with the movable contact point;

the hot moving piece is composed of at least two metals with different thermal expansion coefficients, one end of the hot moving piece is connected with the moving contact piece through an insulating transmission piece, and the hot moving piece drives the moving contact piece to act when being heated so as to enable the moving contact to leave the fixed contact;

the first terminal is connected with the movable contact piece;

the second terminal is provided with a connecting elastic sheet, the connecting elastic sheet is made of a conductive material, and the connecting elastic sheet is arranged below the fixed contact sheet;

the secondary protection device is arranged below the connecting elastic sheet and comprises a fixing plate and an ejector rod, a groove is formed in the fixing plate, a low-melting-point solid metal layer is arranged at the bottom of the groove, the bottom of the ejector rod is arranged on the solid metal layer, and the top of the ejector rod pushes the connecting elastic sheet to enable the connecting elastic sheet to contact the fixed contact sheet.

2. The dual-function temperature controller of claim 1, wherein a pressing plate is disposed at the uppermost end of the dual-function temperature controller, an adjusting screw is disposed on the pressing plate, and the lower end of the adjusting screw abuts against the movable contact.

3. The dual function temperature controller of claim 2, wherein the pressure plate is provided with a limiting structure for limiting the rotation range of the adjusting screw.

4. The dual-function temperature controller of claim 3, wherein the adjusting screw is provided with an external protrusion, the limiting structure is a limiting plate disposed on the pressing plate, and the limiting plate is located on a rotation path of the external protrusion.

5. A dual function thermostat according to claim 2, wherein the pressure plate, the movable contact, the fixed contact, the second terminal and the thermal actuator are sequentially arranged from top to bottom and fixed together by a connecting member, and any adjacent two of the pressure plate, the movable contact, the fixed contact, the second terminal and the thermal actuator are separated by an electrical insulating member.

6. A dual function thermostat according to claim 5, wherein the electrical insulator is a ceramic insulating ring.

7. The dual function thermostat of claim 5 wherein the fixed plate is disposed above the thermal plate, the fixed plate being made of an insulating heat resistant material.

8. The dual function temperature controller of claim 1, wherein the push rod is a ceramic push rod.

9. The dual function temperature controller of claim 1, wherein the melting point of the solid metal layer is greater than 100 ℃ and less than or equal to 350 ℃.

10. A bifunctional temperature controller according to claim 9, wherein the solid metal layer is a tin layer.

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